Forms for pouring walls



Oct. 4, 1955 B. s. BREKKE FORMS FOR POURING WALLS 2 SheetsSheet 1 Filed Dec.

ATTORNEY Oct. 4, 1955 B. s. BREKKE FORMS FOR POURING WALLS 2 Sheets-Sheet 2 Filed Dec. 10, 1952 INVENTOR.

, magnum BENJAMIN S. BREKKE ATTORNEY United States Patent M FORMS FOR POURING WALLS Benjamin S. Brekke, Longview, Wash., assignor of onehalf to Leonard Brekke and one-half to Wallace Brekke, both of Longview, Wash.

Application December 10, 1952, Serial No. 325,185

4 Claims. (Cl. 25-131) My invention relates to forms for pouring walls, which are particularly adapted for the erecting of double concrete walls having an air space between.

The primary object of my invention is the constructing of clamps for holding forms in place for the pouring of the concrete walls, these clamps being of such a nature as to be easily applied to the forms and removed from the forms.

Another object of my invention is the provision of means of contracting the core of the form in order to remove the same from between the formed walls.

A still further object of my invention is the manner in which I apply tie bars between the walls being constructed.

Another object of my invention is the designing of a form that will permit the insertion of vertical and horizontal reenforcing rods within the walls being constructed.

These and other incidental objects will be apparent in the drawings, specification and claims.

Referring to the drawings:

Figure 1 is a fragmentary side view of a wall having been poured and having my new and improved forms mounted thereon for continuing the Wall upwardly, parts of the forms being broken away for convenience of illustration.

Figure 2 is an enlarged sectional view, taken through the core portion of the forms, on line 2-2 of Figure 9, looking in the direction indicated.

Figure 3 is an end sectional view, taken on line 33 of Figure 1 showing the form being mounted to the completed wall and illustrating how the outside walls of the form are supported on the completed wall.

Figure 4 is a perspective view of one of the plates for covering the slots formed in the core for receiving the tie bars.

Figure 5 is an inside view of one of the outside walls of the forms.

Figure 6 is a perspective side view of the core of the form.

Figure 7 is a perspective view of my new and improved clamp for holding the form assembled, part of the clamp broken away for convenience of illustration.

Figure 8 is a perspective view of a frame used for cating fixtures within the wall.

Figure 9 is an end sectional view, taken on line 9-9 of Figure 1, illustrating the form in place ready for pouring the wall.

Figure 10 is a fragmentary view of Figure 9 after the wall has been poured and the core of the form has been collapsed so that the same can be removed from between the walls.

Figure 11 illustrates how the form is applied to a footing upon which the wall is about to be erected.

Figure 12 is a detail view of the closure plate for covering the slot within the core, partially broken away and taken on line 1212 of Figure 11.

2,719,347 Patented Oct. 4, 1955 Referring more specifically to the drawings:

My new and improved form consists of a core assembly 1 and outer walls 2, the core and walls being held together by a special clamp assembly 3. I Will first describe the construction of the core of the form. The core is constructed of sheets or walls 4, secured together at their upper edges by the spacer or filler 5. Reenforcing angles 6 run lengthwise of the core and vertical angles 7 extend upwardly to the spacer 8. The lower edges or sides of the sheets or walls 4 are spaced apart by the spreader 9.

The spreader 9 is slidably connected to the bars 7 by the angular slots 10 by way of the pins 11. The position of the spacer 9 is controlled by the rod 12, which is journalled within the upper end 8 of the bars 7 and held in a fixed vertical position by way of the collars 13. The lower end of the rod is threaded into the spacer 9 by Way of the threads 14.

When the rod is rotated by the hand wheel 15 to raise the spacer 9 within the angular slots 10, the core will be collapsed as indicated in Figure 10, allowing the same to be removed from between the poured walls 16.

The outer walls 2 embrace the outer sides of the previously poured walls 17, as best illustrated in Figures 3 and 9. Referring to Figure 5, it will be noted that projections 18 and 19 are secured to the inner surface of the outer walls 2. The projections 18 form a recess 20 Within thewalls 16 when the material is poured. When the form is reset the projections 19 enter the recesses 20 and support the outer walls or sheets in a predetermined position.

The core 1 is supported in a predetermined position by inserting the tie bars 21 through the slots 22 formed on the lower edge of the walls 4 of the core, as best illustrated in Figures 2, 9 and 10. The core 1 and the outer walls 2 are clamped in place by the clamping unit 3.

The clamping unit 3 consists of jaws 23 and 24. The jaw 23 is bent at 25 extending at right angles therefrom as shown at 26. The jaw 24 is bent at 27 extending at right angles therefrom in the portion as shown at 28.

Flat bars 29 and 30 are secured to the right angle bend 26 by suitable means, as welding as at 31. These flat bars embrace the jaw 24 as best illustrated in Figure 7 and are pivotally connected thereto by the bolt 32 passing through the holes 33 of the flat bars and through the holes 34 of the jaw 24. This holds both jaws together at a predetermined spacing.

A set screw 35 is threaded within the end 36 of the bar 28, having a hand Wheel 37 forming part thereof and adapted to rotate the same, adjusting its end. The end 38 of the screw contacts the bar 26 of the jaw 23 pushing the lower ends 39 of the jaws away or towards one another.

A removable plate 40, having downwardly extending fingers 41, spaces the core 1 relative to the side walls 2, as best illustrated in Figure 9. In the event thicker or thinnerwalls are to be formed, the plate 40 is replaced by another plate having a different gauge between the fingers 41 corresponding to the spacing of the jaws 23 and 24 of the clamping unit 3.

Referring to Figures 4, 11 and 12, I illustrate how the form is applied to a footing wherein the wall is to be erected upon. A spacer bar 42 is laid on the footing and registers within the slots 22 of the core 1. Cover plates 43 arethen applied to the outside of the forms and over the slots 22. These plates also support the tie bars 21 within the notches 44 formed in the upper ends of the plates 43. The spacer bars 42 space the side walls 2 of the forms a predetermined distance from the core 1. The plates 43 are held against the side of the core 1 by the spring 45, as best illustrated in Figure 11.

The spring hooking into the ears 46 forming part of the plates.

I will now describe how my new and improved form is used, referring to Figure 11, in the starting of erecting a wall upon a footing the tie bars 21 are placed within the slots 22 of the core 1, next the cover plates 43 are applied over the slots at which time the spring 45 would be hooked between the said plates, holding them in place. The core is next placed on the footing, at which time the spacer bars 42 would be inserted within the slots 22 and under the plates 43. The collars 42A form part of the spacer bars 42, and are provided for centering the bar relative to the core.

The side walls of the form is next placed against the ends of the spacer bar 42 and the clamp unit 3 lowered down over the core and the side walls. The fingers 41 of the plates 40 centering the core relative to the upper edges of the walls 2. The hand wheel 37 of the clamp is then screwed down, bringing the lower ends 39 of the jaws 23 and 24 against the sides 2 of the form, forcing them against the spacer bars 42 and locking the whole form assembly rigidly in place.

When the wall has cured and the form is removed, the hand wheel 37 is revolved permitting the lower ends 39 of the clamp to expand so that the clamp can be removed, the side walls 2 are then removed easily from the wall, but in order to remove the core the hand wheel 15 is rotated in a direction to raise the spreaders 9 which collapses the core 1, as best illustrated in Figure 10, so that the said core can be raised from between the walls. This, of course, leaves the plates 43 embedded within the wall. When the core has been removed, these plates can be removed from the walls, together with the springs holding them in place.

The spacer bars 42 will remain upon the footing and within the walls, together with the tie bars 21, which pull out of the slots when the core is raised. These tie bars space and hold the walls in erected position.

When the wall is continued upwardly, the procedure is slightly different to the effect that the tie bars 21 are placed upon the top of the wall, as best illustrated in Figure 9, the slots 22 of the cores pass down over the tie bars supporting the core 1 upon the top of the wall. The side walls 2 of the form are then placed on either side of the wall 16, the projections 19 coming to rest in the recesses 20 previously formed by the projection 18 when the wall was poured. This lines the outer walls up evenly with the core.

Next the clamping units 3 are placed over the core and outer walls, the fingers 41 being brought in between the outer walls and on the outer side of the core spacing the said core and walls. The hand wheel 37 is next screwed down bringing the jaws 23 and 24 and their lower ends against the side walls 2, binding the whole unit together. The hand wheel 15 of the core is then rotated so as to lower the Spreaders 9, expanding the side walls 4 of the core to the position shown.

Referring to Figure 1, it will be noted that a clamp bridges the joints between the forms, as well as in between. Figure 8 illustrates a form for making openings within the walls for utilities, such as switch boxes, heaters and the like. This form is placed between the core and side walls when assembling as illustrated in Figure 1. Any number of clamps can be applied to the form, but I have found. that the application as illustrated in Figure 1 is admirably adapted to carry out the objects of my invention.

Due to the nature of the assembly of my forms, I have found it possible to erect vertical reenforcing rods therebetween from the footing running the complete height of the wall so that the roof plates can be bolted down tightly against the finished wall, which is an important feature of my form. Further, I can run horizontal reenforcing rods throughout the length of the walls tieing them into the verticals, still using my form without any difficulty whatever.

Referring to Figure 8, I have illustrated a special form 50 which can be placed between the core 1 and the side walls 2 of the forms for making openings in the wall to accommodate fixtures and the like.

What I claim is:

1. A mold form for making double walls with a continuous air space therebetween, said form comprising an expansible and contractible core member, outer mold boards, a clamp comprising a pair of arms having perpendicularly extending top portions disposed in opposite directions, one above the other, a pivotal connection between the lower of said top portions and the other arm whereby said arms span said outer mold board with said core member therebetween, a screw threaded in the upper of said top portions for abutment with the lower of said top portions to force said arms toward each other and a spacer element carried by said clamp for engaging said core member and walls to retain them in spaced relation.

2. A mold form as defined in claim 1 wherein said spacer element comprises a member removably attached to the lower of said top portions and having spaced downwardly extending fingers for engaging the opposite sides of said core member and the inner sides of said outer mold boards.

3. A mold form as defined in claim 2 wherein said lower top portion has a plurality of spaced apertures for selectively receiving a pivot carried by the other arm, whereby to selectively vary the spacing of said arms.

4. A mold form for making double walls with a continuous air space therebetween, said form comprising an expansible and contractible core member, outer mold boards, a clamp including pivotally connected jaws for spanning said outer mold board with said core member therebetween, a spacer element carried by said clamp for engaging said core member and walls to retain them in spaced relation, and said core member comprising inner mold boards having vertical slots in its lower edge portions for receiving tie bars extending between the spaced walls, in combination with a spacer bar having spaced collars, said spacer bar being positioned in said slots with said collars engaging the adjacent sides to said inner mold boards and with its ends engaging the inner sides of said outer mold boards to retain said latter boards against the clamp jaws, a pair of plates having short slots in their top and bottom edges, said plates being mounted outside of and over the inner mold board slots with their bottom edge slots spanning said spacer bar and with their top edge slots supporting a tie rod in the upper ends of said mold board slots, and a spring connecting said plates and biasing them against said inner mold boards and retaining the latter against said spacer rod collars.

References Cited in the file of this patent UNITED STATES PATENTS 957,599 Crossley May 10, 1910 1,164,352 Jackson Dec. 14, 1915 1,547,221 Lehrack July 28, 1925 1,810,777 McKee June 16, 1931 2,325,686 Kerr Aug. 3, 1943 FOREIGN PATENTS 640 Great Britain 1868 

